• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.48 no.4
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• pp.479-486
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• 2012

In order to obtain the fundamental data about the behavior of conger by underwater audible sound, this experiment was carried out to investigate the hearing ability of Conger eel Conger myriaster which was in the coast of Jeju Island by heartbeat conditioning method using pure tones coupled with a delayed electric shock. The audible range of conger eel extended from 50Hz to 300Hz with a peak sensitivity at 80Hz including less sensitivity over 200Hz. The mean auditory thresholds of conger eel at the frequencies of 50Hz, 80Hz, 100Hz, 200Hz and 300Hz were 105dB, 92dB, 96dB, 128dB and 140dB, respectively. The positive response of conger eel was not evident after the sound projection of over 200Hz. At the results, the sensitive frequency range of conger eel is narrow in spite of swim bladder. Auditory masking was determined for Conger eel by using masking stimuli with the spectrum level range of about 60~70dB (0dB re $1{\mu}Pa/\sqrt{Hz}$). According to white noise level, the auditory thresholds increased as compared with thresholds in a quiet background noise including critical ratio at 68dB of white noise from minimum 26dB to maximum 30dB at test frequencies of 80Hz and 100Hz. The noise spectrum level at the start of masking was distributed at the range of about 68dB within 80~100Hz.

• Journal of Engineering Education Research
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• v.14 no.3
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• pp.55-60
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• 2011

This paper deals with the characteristics of the various fields of convergence studies and the current status of convergence education in domestic universities, based on a case study of Hanbat National University. Each case of convergence education for domestic universities is categorized and analyzed based on the disciplines of the convergence studies. Based on this analysis, a direction for the convergence education policy of university is suggested. The first suggestion is that convergence education should be based on the voluntary recognition of the necessity and meanings of it for both students and educators. Second is that the content of convergence education should be created according to the characteristics of the universities and related industrial structures. Finally, institutional and financial support from the universities should be extended to the self-organized student study groups.

• Health Policy and Management
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• v.15 no.3
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• pp.1-16
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• 2005

This study was planned to investigate the relationship between development levels of learning organization and organization effectiveness in Hospital. Data were collected from 285 respondents who have participated in 'Learning Organization Project'(response rate =$50.5\%$). Structured questionnaire were applied by self administrated survey for two weeks since 2003 May. Main results were as follows; In the result of factor analysis, four factor were created and almost questionnaire items were classified into as same categories as theoretical concepts. Cronbach's a coefficient also showed over 0.7 in all categories. This result means that measurement tool to evaluate the development level of learning organization is valid and reliable. In the comparison of the development level of learning organization by participants' specialties, managerial workers perceived the lowest construction level, while medical technicians evaluated it as the highest level. In regression analysis, the perception levels of work environment, task and human aspect showed positive relationship with job competency significantly. For job satisfaction, levels of task and human aspects had positive relationship significantly. In addition, for organizational commitement, levels of organization and human aspect were positive predictors. Finally, for the satisfaction about experience of learning organization project, levels of environment, task and hmm aspects were related positively. We concluded from these result that the positive relationship between construction levels of learning organization and organization effectiveness was extended to hospital, besides industrial fields. We recommend the introduction and facilitation of learning organization project in various settings to improve the competency of knowledge management in individual and organizational levels.

• Convergence Security Journal
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• v.13 no.2
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• pp.185-193
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• 2013

Military personnel work in high stress situations and carry great responsibilites, leaving them little time to plan effectively for their retirement; typically, they tend to assume that their employer (the government) will do that planning for them. Focussing intensely on their jobs, retirement often finds them ill-prepared, and this in spite of the recent increase in discussion in society at large about retirement and how to deal with it. Government therefore needs to be more proactive in assisting these occupational groups in their exit from the workforce, especially because, as the baby-boomers age, the rate of retirements will increase dramatically. As well, whereas in the past, an average retirement extended for roughly a decade, today, a retirement could last as long as twenty-five to thirty years, with attendant cost pressures on retirement funds. This in turn will increase the burden on the rising generation, who will have to pay for those pensions. But while government has a role to play, retirees also have to be more active in planning for their retirement, and in particular, planning for second careers, rather than simple retirement. Government can assist here by developing programs to help military personel find a second career, thus reducing their reliance on pension funds, and reducing financial pressures too. As well, such planning would emphasize and enhance self-reliance, which can only be to the good of the larger society.

• Nuclear Engineering and Technology
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• v.27 no.3
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• pp.336-343
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• 1995

The Self Tuning Regulator(STR) method which is an approach of adaptive control theory, is ap-plied to design the fully automatic power controller of the nonlinear reactor model. The adaptive control represent a proper approach to design the suboptimal controller for nonlinear, time-varying stochastic systems. The control system is based on a third­order linear model with unknown, time-varying parameters. The updating of the parameter estimates is achieved by the recursive extended least square method with a variable forgetting factor. Based on the estimated parameters, the output (average coolant temperature) is predicted one-step ahead. And then, a weighted one-step ahead controller is designed so that the difference between the output and the desired output is minimized and the variation of the control rod position is small. Also, an integral action is added in order to remove the steady­state error. A nonlinear M plant model was used to simulate the proposed controller of reactor power which covers a wide operating range. From the simulation result, the performances of this controller for ramp input (increase or decrease) are proved to be successful. However, for step input this controller leaves something to be desired.

• Korean Institute of Interior Design Journal
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• v.23 no.1
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• pp.88-95
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• 2014

This study intended arousal of other viewpoints that deal with and understand spaces and shapes, by describing the concept of 'dimensions' into visual patterns. Above all, the core concept of spatial dimensions was defined as 'expandability'. Then, first, the 'golden ratio', 'Fibonacci sequence', and 'fractal theory' were defined as elements of each dimension by stage. Second, a 'unit cell' of one dimension as 'minimum unit particles' was set. Next, Fibonacci sequence was set as an extended concept into two dimensions. Expansion into three dimensions was applied to the concept of 'self-similarity repetition' of 'Fractal'. In 'fractal dimension', the concept of 'regularity of irregularity' was set as a core attribute. Plus, Platonic solids were applied as a background concept of the setting of the 'unit cell' from the viewpoint of 'minimum unit particles'. Third, while 'characteristic patterns' which are shown in the courses of 'expansion' of each dimension were embodied for the visual expression forms of dimensions, expansion forms of dimensions are based on the premise of volume, directional nature, and concept of axes. Expressed shapes of each dimension are shown into visually diverse patterns and unexpected formative aspects, along with the expression of relative blank spaces originated from dualism. On the basis of these results, the 'unit cell' that is set as a concept of theoretical factor can be defined as a minimum factor of a basic algorism caused by other purpose. In here, by applying diverse pattern types, the fact that meaning spaces, shapes, and dimensions can be extracted was suggested.

• 모자간호학회지
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• v.4 no.1
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• pp.80-90
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• 1994

Concept analysis is a strategy that examines the attributes or characteristics of a concept. It is a formal linguistic exercise to determine those defining attributes. The basic purpose of concept analysis is to clarify ambiguous concepts in theory, and to propose a precise operational definition which reflects the theoretical base of the concept. The concept of maternal role is too broad and variable in expression, therefore there has been no authentic definition nor standard opinion for this concept. The purpose of this study is to clarify the concept of maternal role which in turn will help in the development of a theory of maternal role attainment. In order to analyze the concept of maternal role, much effort was extended to look up "maternal role" in various dictionaries and literature, but only a few cases were found which listed this terminology. Consultation on the meaning of "mother" and "role" separately was then done and consequently a definition of "maternal role" was obtained through concept analysis of these two words independently, finding their attributes and unifying them. The attributes of the concept of maternal role which was analyzed based on the steps of concept analysis by Walker & Avant (1988) are : 1) Women who have pregnancies 2) Women who have a child 3) Women who rear a child 4) Expected behavior according to social status 5) Learning through social cultures 6) Social interrelationships. The antecedents of the maternal role are : 1) women who are pregnant and deliver a baby, must keep in contact with their child. 2) Circumstances for childrearing must be provided. 3) Formation of self-concept as mother should be developed, cognitive activity, which is necessary for the nurturing activity, financial support and preparation of childrearing should be provided. And the consequences of the maternal role are : 1) Improvement 2) Changeability 3) Ambiguity 4) Stability Through this concept analysis, the concept of the maternal role is defined as "expected behavior by social interrelationships and learned nurturing behavior through social cultures."

• Journal of Convergence for Information Technology
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• v.8 no.2
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• pp.141-148
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• 2018

The purpose of this paper is to explore the scope of realization of multiple perspectives so that the implementation of the right to be forgotten is more realistic than the ideal information deletion concept. We examined domestic and foreign legal system and technology/service trends, and reflected the classification realization level of service realization, processing type and information characteristics of personal information processor, and legislative/technical factors for multi-level scope analysis. As a result, we have presented a matrix of the range of realization of the right to be forgotten and the scope of diversified regulation by the subject of protection. This study will be extended to the convergence of law and engineering, and will contribute to the prediction of social costs and expansion of the market by identifying the scope of 'deletion rights'.

• Journal of Semiconductor Engineering
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• v.1 no.1
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• pp.13-30
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• 2020

Radio frequency (RF) energy harvesting technology have become a reliable and promising alternative to extend the lifetime of power-constrained wireless networks by eliminating the need for batteries. This emerging technology enables the low-power wireless devices to be self-sustaining and eco-friendly by scavenging RF energy from ambient environment or dedicated energy sources. These attributes make RF energy harvesting technology feasible and attractive to an extended range of applications. However, despite being the most reliable energy harvesting technology, there are several challenges (especially power conversion efficiency, output DC voltage and sensitivity) poised for the implementation of RF energy harvesting systems. In this article, a detailed literature on RF energy harvesting technology has been surveyed to provide guidance for RF energy harvesters design. Since signal strength of the received RF power is limited and weak, high efficiency state-of-the-art RF energy harvesters are required to design for providing sufficient DC supply voltage to wireless networks. Therefore, various designs and their trade-offs with comprehensive analysis for RF energy harvesters have been discussed. This paper can serve as a good reference for the researchers to catch new research topics in the field of RF energy harvesting.

• Journal of Korean Academy of Nursing
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• v.8 no.1
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• pp.43-84
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• 1978

미국에 이민 온 한 한국가정을(정씨 가족) 대상으로 세 번의 면담 (interview) 및 art session을 통해서 이 핵가족 및 확대가족을 다음과 같은 방법으로 분석하여 가족의 유형(family Pattern)과 관계된 이론적 모델(Theocratical model)을 理이해하고 변화되고 있는 Health Program에 있어 간호원이 "변화인자(change agent)"로써의 역활을 재발견하고자한다. 이러한 방법은 가족 및 간호과학에 새로운 접근법이며 간호의 영역이 얼마만큼 확대될 수 있는가를 나타내고 있다. (1) Toman의 Family Cnstellation 이론과 일치되는 점 및 일치되지 않는 점 (2) 한국인 핵가족에서 관찰된 비언어적 의사소통(non-verbal communication)및 이것과 Scheflen의 이론과의 관계 (3) family Theory Bowen의 "differentiation of self"와 "family projection Process"이론에 의한 분석 (4) 핵가족에서 관찰된 상호작용 유형(interactional pattern)을 분석 (5) Art Session을 통해서 관찰된 사항 및 Critique 결과적으로 이 핵가족은 사회적 가치관이 변화된데서 오는 갈등에 직면하고 있다. 우리 나라의 확대가족에서 강조된 경치관은 가족을 하나의 전체로써 보는 "우리 (we-ness)"였는데 이것은 일상사용하고 있는 언어에도 영향을 미치고 있는 것을 볼 수 있어 즉, "내 동생 (my sister)"이라고 하는 대신 "우리 동생 (our sister)"이라고 하는데 여기에서 언어가 뜻하는 의미와는 거리가 먼 것을 알 수 있다. 정씨 부부는 미국적 정치관을 인식해서 그들의 상호작용 유형을 긍정적이고 개방적인 토의방법으로(positive open-discuses) 접근해야 한다. 이 핵가족의 부부는 둘 다 유교사상이 강조된 가정에서 자라나, 이 부부가 결혼한지 오 년이나 되었으나 언어적 의사소통이 (verbal communication)굉장히 제한된 것을 쓸 수 있다. 인간의 경험들은 인간이 접하고 있는 사회와의 상호작용에 의해서 결정된다. 사회가 배화함에 따라서 가족도 변화할 것이다. "변화는 언제나 사회에서 부터 가족으로 온다. 이 변화는 절대 작은 단위에서 큰 단위로 오는 것이 아니다.…그러나 가족구조는(family structure) 환경이 변화함에 따라서 적응해야 한다."라고 Minuchin이 지적한 것 같이 정씨 부부가 직면하고 있는 여러 가지 갈등은 이 핵가족이 그들의 가치관 및 상호 작용유형을 변형(repattering) 시키므로써, 복잡하고 다양한 미국사회에서 성장할 수 있는 좋은 기회를 만들어 주고 있다. 세 번의 면담시간은 각 30분이었으나 Volume 생략한 것을 부기하여 둔다.